Vitrification of lead-rich solid ashes from incineration of hazardous industrial wastes
Lead-rich solid industrial wastes were vitrified by the addition of glass formers in various concentrations, to produce non-toxic vitreous stabilized products that can be freely disposed or used as construction materials. Toxicity of both the as-received industrial solid waste and the stabilized products was determined usingstandard leachingtest procedures. The chemically stable vitreous products were subjected to thermal annealingin order to investigate the extent of crystal separation that could occur duringcooling of large pieces of glass. Leaching tests were repeated to investigate the relation between annealing process and chemical stability. X-ray, scanningand transmission electron microscopy techniques were employed to identify the microstructure of stabilized products before and after thermal treatment. Relation between synthesis and processing, chemical stability and microstructure was investigated
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